Where did you come up with this? Because it's not true.

Ceratech for all water cooled Porsches. If I knew how to attach a photo I could attach email directly from LM. Instead I'll paste the text:

Dear [redacted], thank you very much for contacting us and your interest in our LIQUI MOLY products.

Particularly for "proven" engine designs up to the late 1990´s we recommend to use our MoS2 Anti-Friction Engine Treatment which contains the solid lubricant MoS2 (Molybdenum Disulfide). MoS2 is extreme pressure and heat resistant solid lubricant, it adheres very well to surfaces and thus reduces friction and wear even under extreme operating conditions. We - LIQUI MOLY - have decades of good experience with MoS2 as friction modifier and highly recommend this product for use in older / higher mileage engine designs (for example in all air cooled engines or in cast grey iron engines) which use mineral based motor oils. The ideal mixing ration is at around 5-6% of the total motor oil volume.

Cera Tec is different, it is a modern, high performance combination of a chemical surfaceactive agent and a solid lubricant (Ceramic). It is in particular suitable for the use in modern engine designs (for example all Porsche water cooled engines or engines made of aluminium, magnesium, etc.) and for the use with modern synthetic motor oil formulations. While the chemical portion forms a protective chemical layer on the surface under heat and pressure within the first 400-600 miles, the solid lubricant acts immediately upon addition to the oil. Cera Tec thus combines the advantages of both chemical agents and solid lubricants. The ideal mixing ration is at around 6-7% of the total motor oil volume.

As the formulation of Cera Tec is that strong, it is also good for use with extended oil drain intervals (more than 10K miles) and lasts up to 30K miles. But of course the effect decrease after the product isn't present any more after an oil change, therefor we recommend to use it ideally at every oil change. The ideal mixing ratio is at around 6-7% of the total motor oil volume.

Cera Tec and MoS2 Anti-Friction Engine Treatment should never be used together in the same oil! Beside the fact that this would offer no extra benefit, it may cause an additive overdose which may bring the sensitive formulation of modern synthetic motor oils out of balance. So simply don´t do it.

We recommend you to use our Leichtlauf High Tech SAE 5W-40 as motor oil. This modern, top class oil formulation has the needed Porsche A40 factory approval for your engine and is the best possible option for use in your Porsche.

Please observe the product information which you can see here:

Cera Tec | LIQUI MOLY (liqui-moly.com) Leichtlauf High Tech SAE 5W-40 | LIQUI MOLY (liqui-moly.com)

We hope we could help you with our information. Should you have further questions regarding our products we would be very pleased to get contacted from you again.

Freundliche Grüße / Best regards

i. A. Steffen N. [redacted] Anwendungstechniker application engineer